Clinical information

Diagnosis:

Comments:

Two components: most commonly a combination of compound naevus and deep penetrating naevus

Each of the two components shows the classical features of the corresponding naevus subtype

The presence of two divergent naevus histological phemotypes may inappropriately raise a suspicion of malignancy (malignant transformation within a naevus)

The blue naevus-part of the lesion may be noticed clinically and raise suspicion (variation in colour of the lesion; asymmetry)

The blue naevus component is most often located in the central part, but it may be on one side, resulting in gross asymmetry

Since each of the two component can be recognized as a benign naevus, the combined lesion is benign as well

The lesion is sometimes whimsically referred to as 'true and blue naevus'

A very minor blue naevus-component is not rare in other naevus types, and a small 'non-blue' component is regularly encountered in blue naevi, so that the phenomenon of combined naevus subtypes is not rare at al. The term 'combined naevus' is better reserved for those lesions where both components constitute a significant part of the entire lesion.

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Dear {friend_name},
{url}
I believe this website may be of interest to you. It is an Open Educational Resource, containing a large collection of digitized histologic slides with explanatory films and other materials, aimed at surgical pathologists, dermatopathologist and pathologists in training. This site is entirely based on consultation materials of professor Wolter Mooi, VU University Amsterdam, and can be used free of charge.
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